USA Opals are found in several areas,
Virgin Valley in Nevada USA.
The area is known for its unusual fire play in wood ,limp casts and bark replacement.
Virgin Valley opals. They are black opals, found in Humboldt County, Nevada. Their black matrix contains stunning flashes of red, blue, purple, and green
There is some opal attached to this specimen. We have taken the photo wet. Great collector’s item.
Virgin Valley opal is believed to be app 14 -15 million years old.
The opal has a tendency to craze when dried too fast as it contains up to 14 % water.…